LTC3210-1_15 Datasheet, PDF (3/16 Pages) Linear Technology – MAIN/CAM LED Controller with 64-Step Brightness Control in 3mm 3mm QFN

LTC3210-1
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_BAT = 3.6V, C1 = C2 = C3 = C4 = 2.2µF, RM = 30.1k, RC = 24.3k,
ENM = high, unless otherwise noted.
PARAMETER
Unused MLED Detection
Test Current
CONDITIONS
MLED Tied to CPO
MIN TYP MAX UNITS
l
4
16
µA
Threshold Voltage
CLED Current
V_CPO – V_MLED
l 0.5
1.5
V
LED Current Ratio (I_CLED/I_RC)
LED Dropout Voltage
CLED Current, 3-Bit Linear DAC
Charge Pump (CPO)
1x Mode Output Voltage
1.5x Mode Output Voltage
2x Mode Output Voltage
1x Mode Output Impedance
1.5x Mode Output Impedance
2x Mode Output Impedance
CLOCK Frequency
I_CLED = Full-Scale
Mode Switch Threshold, I_CLED = Full-Scale
1 ENC Strobe (FS)
7 ENC Strobes (FS/7)
I_CPO = 0mA
I_CPO = 0mA
I_CPO = 0mA
V_BAT = 3.4V, V_CPO = 4.6V (Note 4)
V_BAT = 3.2V, V_CPO = 5.1V (Note 4)
l 6930 7700 8470
A/A
500
mV
380
mA
54
mA
V_BAT
V
4.55
V
5.05
V
0.55
Ω
3.15
Ω
3.95
Ω
0.8
MHz
Mode Switching Delay
CPO Short-Circuit Detection
Threshold Voltage
0.4
ms
l 0.4
1.3
V
Test Current
ENC, ENM
CPO = 0V, ENM = ENC = Low
l 10
30
mA
V_IL
V_IH
I_IH
I_IL
ENC, ENM Timing
ENM = ENC = 3.6V
ENM = ENC = 0V
l
0.4
V
l 1.4
V
l 10
15
20
µA
l –1
1
µA
t_PW
Minimum Pulse Width
l 200
ns
t_SD
Low Time to Shutdown (ENC, ENM = Low)
l 50
150
250
µs
t_EN
Current Source Enable Time
(ENC, ENM = High) (Note 5)
l 50
150
250
µs
RM, RC
V_RM, V_RC
I_RM, I_RC
l 1.16 1.20 1.24
V
l
80
µA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Based on long-term current density limitations. Assumes an
operating duty cycle of ≤10% under absolute maximum conditions
for durations less than 10 seconds. Maximum current for continuous
operation is 300mA.
Note 3: The LTC3210E-1 is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 4: 1.5x mode output impedance is defined as (1.5V_BAT – V_CPO)/I_OUT.
2x mode output impedance is defined as (2V_BAT – V_CPO)/I_OUT.
Note 5: If the part has been shut down then the initial enable time is about
100µs longer due to the bandgap enable time.
32101fd